3965557 has 4 divisors (see below), whose sum is σ = 3971916. Its totient is φ = 3959200.

The previous prime is 3965537. The next prime is 3965569. The reversal of 3965557 is 7555693.

3965557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1865956 + 2099601 = 1366^2 + 1449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3965557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128 + ... + 3529.

It is an arithmetic number, because the mean of its divisors is an integer number (992979).

Almost surely, 2^3965557 is an apocalyptic number.

It is an amenable number.

3965557 is a deficient number, since it is larger than the sum of its proper divisors (6359).

3965557 is an equidigital number, since it uses as much as digits as its factorization.

3965557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358.

The product of its digits is 141750, while the sum is 40.

The square root of 3965557 is about 1991.3706335085. The cubic root of 3965557 is about 158.2831673636.

The spelling of 3965557 in words is "three million, nine hundred sixty-five thousand, five hundred fifty-seven".